Blowpipe nozzle



Dec. 18, 1928.

R. J. KEHL BLOWPIPE NOZZLE Filed June 11. 1921 IN V EN TOR: 4 1 :26

ATTORNEYS Patented Dec. 18, 1928.

ROIB ER'I' J'. KEHL OF CHICAGO, ILLINOIS,

ASSIGNOR TO OXW'ELD ACETYLENE GOM- PANY, AQCOBPQRATION OF WEST VIRGINIA.

BLOWPIPE NOZZLE.

Application filed June 11 This invention relates to blowpipe nozzles andparticularly to a multiple flame nozzle adapted for use withmachine-welding blowpipes, but it will be understood that the principles of the invention may be utilized in other types of blowpipenozzles.

Multiple flame nozzles as heretofore constructed have been provided withsubstantially parallel outlet passages formed by straight drilling intothe nozzle body. The flames from the orifices of a nozzle of this typeare blunt and in welding operations spread over a comparatively widearea on opposite sides of the line ofweld, resulting in dissipation ofheat and uneconomical use of gas. In a nozzle of this type, moreover,all of the orifices are always open, whereas, for "different classes ofwork, it is desirable at times to use less than the total number oforifices, or orifices varying in size orarrangement. I

One of the objects of this invention is to provide a multiple flamenozzle in which the outlet gas passages are constructed to developcomparatively long tapering and pointed flames, the points of WlllCllmay be more closely confined to a given portion of the weld.

Another object of the invention is to provide a multiple flame nozzlewhich will allow a choice of orifice arrangement, i. e., a variation'ofthe orifice size; a choice of the location, relative distance from theweld, and number of orifices in use.

which the parts may be easily and economically interchanged, adjustedand replaced, thereby permit-ting a wide heating range froma singlenozzle.

The above and other objects and the novel features of the invention willbe apparent from the following description taken in connection with thedrawing, in which Fig. 1 is a sectional view of a multiple flame nozzleembodying this invention, showing the same connected to a gas mixingdevice,

Figs. 2 and 3 are sectional views of other multiple flame nozzlesembodying the present invention, I

Figs. 4 and 5 are side elevational views of other nozzles embodying the;present invention, illustrating different orifice arrangements, and

Figs. 6 and 7 are, respectively, a longitudlnal sectional view and anend elevational view Another object is to provide a nozzle in 1921.Serial No. 476,858..

of another nozzle embodying the present invention.

Generally speaking, a tapering or conical flame having a pointed end isdesirablebecause the heat thereof may be directed ap-. proximately alongthe line of weld and by thus confining the heat, a more economicaloperation is obtained. A nozzle constructed so as to produce flames ofthis type is illus trated in Fi 1 in which the unitary body or castingis provided with a longitudlnally extending main gas passage G. The maingas passage communicates with and distributes the mixture to a series ofparallel gas passages, portions of which taper toward or to a pointadjacent their orifices, whereby tapering flames are produced. Thecasting C is elongated, being of such length that it pro ectsconsiderably beyond one side of the outline of the mixer M to which itis coupled, so that the orifices therein may be distributed a distancealong the seam to be welded.

In the particular arrangement shown in Fig. 1, the tapering gas passagesA are formed in tips T which may be detachably connected to the nozzlebody, as by threaded stems T thereon adapted to screwinto the threadedholes H which communicate with the main gas passage G. The threadedholes H may be formed by straight drilling relatively large holes andtapping the same. In the nozzle illustrated in Fig. 2 an equivalentconstruction is shown in which the body C has externally threaded hollowstuds h to fit in the internally threaded ends t of the tips 25 whichhave tapering passages a. The lower side of the nozzle body may be ofstepped formation, roviding a series of steps B, into the faces of theaxes of said holes desirably being parallel toone another and oblique tothe axis of the main gas passages G, so that the orifices'R or r of thetips may be approximately the same distance from the main passage Gl Acomplete blowpipe includes a mixing device M coupled to the inlet end ofthe nozwhich the holes H, h are drilled, l

zle casting, as by a suitable nipple N and As alread indicated, byproviding a set of interchangeable tips, of suitable metal such ascopper, brass or bronze, which may be screwed onto the nozzle body,variations of the tip arrangement may be effected, as is shown, forexample, in Figs. 1 and 4:, wherein tips of different size are arrangedin the holes at the opposite ends of the nozzle casting. Other orsimilar tips could be screwed in the intermediate holes H, asillustrated for example in the nozzle shown in Fig. 4, but for thepurpose of illustrating another advantage of this type of nozzle theintermediate holes are shown as closed off by suitable plugs P, havingscrew-threaded stems P fitting the threaded holes H. Both the tips andthe screw plugs may have suitable means, such as the hexagon portionsshown, to facilitate tightening and removing them with a wrench or othertool. Similarly, cupshaped internally threaded plugs or caps 72 may beprovided to close off outlets of the nozzle body shown in Fig. 2.Several sets of tips of difierent sizes may be provided for each nozzleto permit of a variation in the sizes of tips used and a set of plugsmay be furnished with each nozzle so that the positioning andarrangement of the tips may be widely varied as desired. Fig. 5, forexample, shows another variation'in the arrangement of the tips andlugs. Collars or washers W ma be placed at the shoulder of the tips ordi erent length tips may be used to locate the flames at desireddifferent distances from the weld, as illustrated in Figs. 1, 2 and 5.Accordingly, a wide choice of tip and orifice arrangements is possiblewith the improved multiple jet nozzle and blowpipe embodying thisinvention.

Where the work performed by a nozzle, for example on a machine-we dingblowpipe, requires only one size and arrangement of flames, another typeof multiple flame nozzle embodying the resent invention may be employed,in whicli the flames from the orifices are tapering and pointed but inwhich the orifices and the tapering passages thereto are directly formedin the casting, as illustrated for example, in Fig. 3. In thisarrangement, the tapering passages H communicate with the main gaspassage G and may be formed directly in the casting by drilling. Inorder to taper these passa es downwardly toward their orifices R adacent the stepped lower side of the casting, tapering drills areinserted through holes V in the ven v upper side of the casting oppositethe tapering passages H. The end passage H opposite the gas inlet may bedrilled to a taper y inserting the tool through the nipple N. When thetaperin passages have been completed, the holes may be closed, as bybrazing in a plug as shown. In this arrangement of course, all of thetapering passages supply gas jets during the operation of the blowpipeand as the number or arrangement of jets may not be readily varied, thetype of nozzle construction shown in Figs. 1, 2, 4 and 5 is the moredesirable one for general welding purposes. When in use on amachine-:welding blowpipe the nozzle is desirably ad usted so that theseries of jets or flames impinge on the work X at an oblique angle alonga given seam to be welded.

The nozzle shown in Figs. 6 and 7 also embodies this invention and inthis construction the main gas supply passage I has several passages 2',i and z' branching therefrom, comprisin one or more threaded parts having tapere tips T detachably coupled there to. The assages z' and z' areoblique to the axis of t e passage I. The gase supply passage I iswithin a threaded nipple N by means of which the nozzle may be coupledto the mixing device of a blowpipe. Means, such as a collar Z havingopposite flat faces, may be provided to facilitate the use of a wrenchin coupling and uncoupling the nozzle and gas supply device or mixer.Suitable plugs and tips may also be en plied to be interchangeablcoupled to the body C" of this nozzle so t at the flame arrangement maybe readily varied as desired.

While the improved nozzles and blowpipes are shown and described indetail, it is to be understood that modifications may be made thereinwithout departing from the principles of the invention or sacrificingany of its advantages.

I claim:

1. A multiple flameblowpipe nozzle comprising a main gas passage, aseries of outlet passages branching from said main passage, and tips andplugs having portions adapted and arranged to removably andinterchangeably fit said outlet passages whereby the orifice arrangementof the nozzle may be varied.

2. A multiple flame blowpipe nozzle comprising a main gas passage, aseries of outlet passages branching from said main passage, and plugshaving portions adapted and arranged to removably and interchange ablyfit the ends of said outlet passages whereby the orifice arrangement ofthe nozzle may be varied.

3. A multiple flame blowpipe nozzle comprisin a main gas mixture passae, a series of out et passages branching angu arly from said mainpassage and threaded near the ends thereof; and a set of tips and plugsadapted and arranged to removably and interchangeably fit said outletpassages whereby the outlet orifice arrangement of the nozzle may bereadily varied as desired; each tip having a longitudinal passagetapering toward its orifice, a threaded part adapted to fit any one ofsaid threaded passages and means engageable by a suitable tool tofacilitate tightenmg and removing the same; each plug having a threadedpart adapted to fit any one of said threaded assages, and means en ageonthe lower side of said casting, and tips and able by a suita 1e tool tofacilitate tig tenplugs having threaded portions adapted and 10 ing andremoving the same. arran ed to removably and interchan eably 4. Amultiple flame blowpipe nozzle comfit said threaded outlet passages,where y the prising a casting having a stepped lower side orificearrangement of the nozzle. may be and a main gas passage, a series ofthreaded readily varied as desired.

outlet passages branching from said main In testimony whereof, I aflixmy si atureQ passage and severally terminating in the steps ROBERT J.HL.

